Louis paul brandt



(1 Model.)

7 L. P. BRANDT.

STEM WINDING WATCH.

No. 534,780. Patented Feb. 26, 1895.

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UNITED STATES PATENT OFFICE.

LOUIS PAUL BRANDT, OF BIENNE, SWITZERLAND, ASSIGNOR TO LOUIS BRANDT &;FRERE, OF SAME PLACE.

STEM-WINDING WATCH.

SPECIFICATION forming part of Letters Patent No. 534,780, dated February26, 1895.

Application filed October 18,1894. Serial No. 526,269. (No model.)

To all whom it may concern.-

Be it known that I, LOUIS PAUL BRANDT, a member of the firm of LouisBrandt & Frere, watch-manufacturers, of Bienne, Switzerland, haveinvented new and useful Improvements in Stem-Winding Watches, of whichthe following is a specification.

The invention consists of an improved device for the transmission of therotation of the stem of stem-winding watches of any system orconstruction whatever either to the winding-up ortothehand-setting-mechanism.

In the accompanying drawings my improved device is shown in bothpositions for the handsetting and for'the winding-up of the Watch.

Figure 1 shows the device in position for the winding-up. Fig. 2 showsit in position for the hand-setting. Fig. 3 is an enlarged detailed viewof some of the working parts of my device.

G is the stem upon which is disposed the winding'upwheel 0 which isintended to act upon the usual gear-wheels (not shown) causing thewinding-up of the main-spring.

(J is the usual sliding pinion, mounted upon a square portion of thestem G and provided with click-teeth c intended to act upon thecorresponding click-teeth c of the above mentioned wheel 0 which is freeupon the said stem G. The sliding-pinion O is further provided with ateeth-range 0 into which engages a gear-wheel d which is pivoted to thearm 19 of the rocking-lever B as described below.

A spring B tends to maintain the rockinglever B in the rest-positionshown in Fig. 1.

My device is composed of a rocking-lever B pivoted at b to the plate Aand guided by means of a screw b passing through a slot 1) pivoted tothe said lever B and fixed to the plate A. The arm 12 of said leverengages in the circular groove 0 of the sliding-pinion O and the arm bbears the gear-wheel d, which is intended to act upon the usualhandsettingwheel D. There is further provided a rocking lever E pivotedat c to the plate of the watch. The arm e of said stem E is providedwith a suitable projection engaging a circular groove of the stem G. Ifone throws the said stem G in the sense of the arrow of Fig. 1 it causesthe lever E to be rocked into the position shown in Fig. 2 in which itsother arm e bears against the notched end of the arm 12 of the lever B,as shown in Fig. 2, thus throwing the gear-wheel d into gear with theminutewheel D and releasing at same time the clickteeth 0 of the slidingpinion 0 from the clickteeth 0 of the winding-up wheel 0.

In order to secure the rocking-lever E, either at rest or in its actingposition, I provide a stopping-spring or brake F fixed to the plate Aand passing beneath the rocking-lever E. The end of said spring is bentupward and constitutes a catch f against which bears the arm e of thelever E when the said lever E is at rest as shown in Fig. 1.

When the lever E is acted upon as above specified by throwing the stem Gin the sense of the arrow for the purpose of setting the hands, the saidlever is obliged to pass over the proj ectionf, depressing the sameandcompressing at same time the spring F. The stroke of the lever E islimited by the arm 6 as shown in Fig. 2 and the spring F is then keptcompressed, its bent end f pressing against the lower face of the arm 6of lever E and acting as a brake upon the same so as to prevent its toofreely displacing.

Having thus described my invention, I claim- In hand-setting watches,the combination of a stem G, a rocking-lever 13 provided with two armsI) and b and acting upon a sliding-pinion C of usual construction, andof a rocking-lever E having two arms 6 and 2 with a stopor brake-springF so disposed that its hooked end fengages the notched end of the arm I)of the lever B and hooks itself to the side of the arm c of therocking-lever B when the mechanism is at rest, and that its said endfacts like abrake upon thelower face of said arm 6 when the lever-E isrocked into the position in which it bears with its arm 6 in the notchedend of the arm 11 of lever B, substantially as shown and described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LOUIS PAUL BRANDT.

Witnesses:

F. H. BEssIEL, E1). HAAs.

